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Finding the Fourth Proportional to 520,718.26, 718,645.32 and 299,963.17

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Solution

The fourth proportional to 520,718.26, 718,645.32 and 299,963.17 is: 413,980.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,718.26 : 718,645.32 = 299,963.17 : x
  2. Step 2: Convert to fraction form
    520,718.26/718,645.32 = 299,963.17/x
  3. Step 3: Cross multiply
    520,718.26x = 718,645.32 × 299,963.17
  4. Step 4: Simplify right side
    520,718.26x = 215,567,125,148.79
  5. Step 5: Solve for x
    x = 215,567,125,148.79/520,718.26
  6. Step 6: Final answer
    x = 413,980.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.